Muffler.



MUFFLER.

APPLIOATION FILED JAN. 5, 1910,

Patented June 13, 1911.

2 BHEETS-SHEET 1.

7 PPM.

, ca WASHINGTON, 0.1-.

R. B. LOPER.

MUFFLER.

APPLIUATION FILED JAN. 5, 1910. 995 ,265.\

Patented June 13, 1911 YPM.

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2 SHEETS-SHEBT 2.

RALPH E. LOPER, 0F PORT JEFFERSON, NEW YORK.

MUFFLER.

Application filed January 5, 1910.

To all whom it may concern:

Be it known that I, RALPH E. Lorna, of Port Jefferson, in the county ofSuffolk and in the State of New York, have invented a certain new anduseful Improvement in Mufflers, (Case B,) and do hereby declare that thefollowing is a full, clear, and exact description thereof.

My invention relates particularly to an improvement in mufflers designedto muflle the sound of the exhaust of engines, and especially theexhaust from automobil engines. I

The object of my inventlon s to more perfectly destroy the sound whichusually results from an engine exhaust, and to s1mplify the constructionin such a manner that the expense thereof will be reduced to a minimum.

I have shown one embodiment of my 1nvention in the accompanyingdrawlngs, in which Figure 1 is a longitudinal section of a mufller madein accordance with my invention; Fig. 2 is an elevation of one of thesections contained within the muflier; Flg. 3 is a cross-section takenon line 33 of Fig. 2; Fig. 1 is a cross-section taken 0n line 4:-4 ofFig. 2; Fig. 5 is a similar vlew to Fig. 2, but showing a slightlymodified form of section; and Fig. 6 is a cross-section of the sametaken on line 66 of Fig. 5

In the accompanying drawings, 1 1s a pipe of an engine exhaust, which isscrewthreaded to one end of a cylindrical casing 2, the other end ofsaid casing being provided with a cap 3 having a circular opening 1.Within the casing 2 there is provided a series of telescoping sections5, each of which comprises a cylindrical portion 6 and a flat bottom 7.The free edge of the cylindrical portion 6 is provided with an off-setflange 8- for receiving the bottom of the adjacent section. The centralportion of the bottom 7 is cut away to produce a segmental opening 9, atone side of which there is an upset projection 10, comprising twoparallel side faces 11 and an inclined front face 12.

The modified form, as shown in Figs. 5 and 6, is constructed in exactlythe same manner, except that the central opening 9 is provided at oneside thereof, and opposite the upset projection 10, with a dependinginclined flange 13.

In the operation of the device, as the gas escapes from the exhaust pipe1 into the Specification of Letters Patent.

Patented June 13, 1911.

Serial No. 536,464.

casing 2 and through the openings 9 in the sections 5, a portion of thecurrent of gases is deflected by the projection 10 in each of thesections, so that as a result a circular current of high velocity isproduced in each of the sections 5. The circular currents thus producedgradually lose their speed, owing to the friction thereof upon the wallof the sections, so that when under the reduced speed of rotation thecentrifugal force becomes less than th expansive force of the gases,portions of the currents gradually escape between faces 11 underneaththe inclining face 12 into the succeeding sect-ions. The effect of thesections 5 is thus to cause the current of exhaust gases entering fromthe exhaust pipe 1 with a variable speed, which variable speed is theactive cause of the noise produced by a non-muffied exhaust, to bedischarged. from the end of the casing 2 through the opening 4, as acurrent of gases having very nearly a constant speed. In the case of themodification shown in Figs. 5 and 6, this result is accentuated by thepresence of the flange 13, which deflects the gases escaping through thecentral opening 9 in any one section 5 toward the upset projection 10carried by the succeeding sec tion 5. The presence of these flanges 13effectively prevents any portion of the current from going through themuffler unmodified. In this modified form a portion of the current ofgases coming from th exhaust pipe 1 will be directly deflected by beingcaused to impinge upon the inclined planes 12, while the remainingportions of the current between any two adjacent sections will be causedto follow an inclined path directed toward the projection 10 of the nextsucceeding section. Under these circumstances, it is impossible for anyportion of the current to pass directly from the exhaust pipe 1 outthrough the end of the casing 2 without being interrupted.

While I have described my invention above in detail, I wish it to beunderstood that many changes may be made therein without departing fromthe spirit thereof.

I claim 1. In a device of thecharacter described, an exhaust pipe havingan outlet opening, a shell adapted to receive a current of gases, andmeans for causing the gases to rotate therein on th axis of saidcurrent, com prising an inclined surface located directly in front ofsaid opening.

2. In a device of the character described, an exhaust pipe having anoutlet opening, a shell adapted to receive a current of gases, and meansfor causing the gases to rotate therein on the axis of said current,comprising an inclined surface diagonal to said axis and locateddirectly in front of said opening.

In a device of the character described, an exhaust pipe having an outletopening, a shell adapted to receive a. current of gases, means forcausing the gases to rotate therein on the axis of said current,comprising an inclined surface located directly in front of saidopening, and a deflector for deflecting th current toward said inclinedsurface.

l. In a device of the character described, an exhaust pipe having anoutlet opening, a shell adapted to receive a current of gases, means formusing the gases to rotate therein on the axis of said current,comprising an inclined surface diagonal to said axis and locateddirectly in front of said opening, and a deflector for deflecting thecurrent toward said inclined surface.

5. In a device of the character described,

a. casing, and a plurality of sections therein, each of which isprovided with a bottom having a segmental opening.

6. In a device of the character described, a casing, and a plurality ofsections therein, each of which is provided with a bottom having asegmental opening, and a projection at one side of the opening.

7. In a device of the character described, a casing, and a plurality ofsections therein, each of which is provided with a bottom having asegmental opening, and an inclined projection at one side of theopening.

8. In a device of the character described, casing, and a plurality ofsections therein, each of which is provided with a bottom having asegmental opening, and an inclined projection at one side of the openingand a depending flange at the other side of said opening In testimonythat I claim the foregoing I have hereunto set my hand.

RALPH E. LOPER. Witnesses A. NEWGOMB, M. MEIKLE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

